Grinding-machine.



H. T. SHEARER.

GRINDING MACHINE.

APPLICATION FILED JULY 10, 1912.

Patented Feb. 10, 1914.

2 SHEETS-SHEET 1.

H. T. SHEAR-ER.

GRINDING MACHINE.

APPLICATION FILED JULY 10, 1912.

Patented Feb. 10, 1914.

2 SHEETS-SHEET 2.

In M UNITED STATES PATENT orrrcn.

HARRY T. SHEAREB, OF WAYNESBORO, PENNSYLVANIA, ASSIGNOR T0 LANDIS 'I'OOL COMPANY, OF WAYNESBORO, PENNSYLVANIA, A CORPORATION.

GRINDING-MACHINE.

Specification of Letters Patent.

Patented Feb. 10, 1914.

Application filed July 10, 1912. Serial No. 708,734.

T 0 all whom it may concern Be it known that I, HARRY T. SHEARER, a citizen of the United States, residing at WVaynesboro, Franklin county, and State of Pennsylvania, have invented and discovered certain new and useful Improvements in Grinding-Nlachines, of which the following is a specification.

My said invention relates to grinding machines and particularly to the mechanism for traversing the grinding wheel across the carriage, or to and from the work, its object being to provide such a mechanism which may be quickly and easily operated from a convenient point on the outside of the machine, and one by which said wheel may be rapidly moved to and from its operative position by power taken from the power-shaft of the machine.

A further object is to provide such a traversing mechanism which may be readily applied to any machine, it being located upon the outside of the machine casing so that practically no change in the machine structure is required inits application.

With these and other objects in view said invention as illustrated, comprises a shaft operated by a pulley from the belt which drives the grinding wheel, said shaft having mounted thereon a conical friction wheel adapted to engage either one of a pair of friction disks mounted upon a sleeve keyed to the shaft which controls the travel of the carriage which carries the grinding wheel. This mechanism is controlled by suitable levers within convenient reach of the operator. Modifications in details may be made without departing fro-m my invention which will be more clearly defined in the claims.

Referring to the accompanying drawings, which are made a part hereof and on which similar reference characters indicate similar parts, Figure 1 is a side elevation of the grinding wheel carriage with my improved reversing mechanism applied thereto, Fig. 2 a sectional view looking in the direction of the arrow from the dotted line 2-2 in Fig. 1, and, Fig. 3 a detail section on the dotted line 33 in Fig. 2.

In said drawings the portions marked A represent the grinding wheel, B the grinding wheel base, G the grinding wheel carriage, and D the grinding wheel driving belt.

The grinding wheel A is mounted upon the usual spindle a, which carries a pulley (61 around which passes the belt D. This belt passes over an idler pulley b and down around the driving drum (not shown) of the grinding machine and up over a second idler pulley b and thence around a tensioning pulley b and back over the pulley a upon the grinding wheel spindle a. This is the usual method of driving the grinding wheel and is illustrated and described as a means of operating the improved reversing mechanism.

The grinding wheel base B is mounted to slide transversely on carriage C, as usual and has a bracket 1 secured thereto. This bracket has an extended arm 2 in which is journaled one end of a short shaft 3. Upon this shaft is mounted a pulley 4 in such position as to contact and press downwardly upon the belt D so that a movement of this belt will transfer power to the said pulley 4. The opposite end of the shaft 3 is journaled at 5 in a cylindrical casing 6 mounted upon an upright shaft 7, journaled in the base B. The inner end of the shaft 3 has a conical friction wheel 8 mounted thereon adapted to contact with either of a pair of friction disks 9 and 10 carried by a sleeve 11 which is splined to the shaft 7. The disks 9 and 10 are adapted to be brought into a driving engagement with the friction wheel 8, the direction of rotation of the shaft 7 being governed by which of said disks is brought into such contact. The movement of the disks 9 and 10 is accomplished by means of an arm 12 whose yoked ends 13 engage a groove 14 formed in one end of sleeve 11. Said arm 12 is pivoted upon a shaft 15 having bearings in the casing 6 and the bracket 2, and upon the outer end of this shaft is rigidly secured an arm 16, the outer end of which is bifurcated to receive the end 17 of a push-rod 18 to form a hinge connection between said arm and push-rod for operating the reversing mechanism. The rod 18 normally holds the sleeve 11 in a central position with disks 9 and 10 equi-distant upon either side of the friction wheel 8, said position being sustained by means of a spring 20 interposed between one side of a support 21, and a collar 22 secured to said rod 18. The outer end of this rod has a handle 23 for convenience in operation.

The shaft 7 upon which the sliding sleeve 11 is mounted extends downwardly through p; oeagove ear on said gooiver shaft .v'th either face of said m shtin-ear he means for sliding said earria i =3 HQ iase are either face there- 'iiout :1

ed portion he power shaft, snh- ,hanisin for \vorn'i gear 2::- and :11, oh n 1i. screw-shaft on. Said hub 27 is 11101 rriage, a part i in an arm depending 12ft carried resting against one sei iverinfo med on said iournaled in said slider i said gee r, e powe shaft, "power shaft with and a collar 35 on the outer end i 1 against the oiner end, thus coupling" to Wheel to travel therewith, so rotation ofthe shaft 26 motion is the base B in a direction in line e shaft 26. Shaft is nonnteil ii; a h :28 formed upon the carriage C and 11pm extreme end of this shaft nioiinte beveled gear 29 which engages a v pinion 30 mounted upon a shaft 31, forni' a part of the grinding machine ineehai The operation is as follows: transmitted to the shaft 3 through the D and the pulley 4.- eansino; the rota ion of said Wormso of engage- .7 niachii'ie, means for inov- 55 .neel towerd and from the par pert embodying a of and mounted e, a screw engaging a gear part on the the other gear part, said gear part on the the conical friction Wheel 8. deslred to move the glllltflliifi' v direction toward the \YOlk, t

ill-951115 slide and means for reversing its motion,

operated in the direction to c a t suhstantial as set forth. engage the Wheel 8, which the an me; DJfiClllilQ DiOVlClGCl with niovi the grinding; Wheel tooni the work eonngrising a oarslider, screw-shaft on the ear- ,readed pelt on said screw- With the slider to travel in a forward direction. ll hen. i

to reverse the direction or travel of r k grinding Wheel the rod 18 operated in en earing; for driving said part, opposite direction causing 4 1e dish 10 to re ide the motion of gear, engage the friction cone 8 which TJSPltS "a 1* .ea throwing said seal into or a r verse movement of the direction of gravel r 4 substantially as set forth.

machine, the eonibina- Wheel carriage, a slider Wheel on said slider,

aversing said slider across of the Wheel Having; thus fully described u vention What ll claim as new secure by Letters Patent is:

1. ilk grinding Wheel feed mechanism onipriiing inter-engaging grinding;machines COZDPMS'IQ'HE$Ci6"\-Sl1tli'f" on said carriage and the secured to and extending tr 7 r i 1' i i j y i- I a power shaft, gearing carriage, a nut nihodyin nested to move with the naled on said slider and j power shaft with said 15 for throwing said onerat ve conneetlon,

Q machine, the combina- F'l eel carriage, a slider wheel on said slider, traversing said slider across a gear part on the slider may be operated i from said power shaft,

forth. n the slider engaging is e i: 's: J shaft, gearing for congrindin .t said dear part lllOllllbfiCl upon and of the carriage a on said screw a shaft jonrnaled in so ally ioldiiig t, means for to part for tame/ling; t 4 subs se'eW-shaft, a donhlefaeed friction 8, e, means for 1novi mounted. to slide on said toward and from the work comprising a screw-shaft on the carriage, a nut part on said screw-shaft and connected to move with the slider, a Wormwheel on said nut part, a worm-shaft journaled in the slider and engaging the worm wheel on the nut part, a sleeve splined to slide a limited distance on said worm-shaft and carrying a friction gear with two engaging faces spaced apart, a shifting lever connected to said sleeve for operating it, means for holding it in a normal position, a power shaft, and a friction gear on said Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

